Coal-pulverizing machine



w 3a v mm b? u 5 I u H. T A A i E a w :|r Q L INVENTOR LPH JACKSON BY ATNEY -Oct. 1, 1929. R. JACKSON GOAL PULVERIZING mcnmn Filed April 12,1926 WITNESSES Patented Get. 1, 1929 UNETED STATES PATENT OFFICE RALPHJACKSON, OF COVENTRY, ENGLAND, ASSIGNOR TO ALFRED HERBERT LIN"- ITED, OFBUTTS, COVENTRY, ENGLAND, A BRITISH COMPANY COAL-PULVERIZING MACHINEApplication filed April 12, 1926, Serial No. 101,236, and in GreatBritain May 2, 1925.

This invention relates to coal pulverizing machines, and moreparticularly to machines of the kind comprising a pulverizing chamberand a fan chamber separated by a diaphragm plate. The object of theinvention is to provide simple and expeditious means for obtainingaccess, from one end of the machine, firstly to the interior of the fanchamber and then to the interior of the pulverizing chamber.

According to this invention, there is employed on the pulverizingmachine a hinged cover, and a displaceable bearing for the shaft,whereby, after the bearing has been displaced, the cover can be movedabout its hinge to give access to the interior of the casing.

If desired, this cover may form a casing for the fan, and be hinged tothe pulverizing chamber.

The diaphragm plate may also be hinged, preferably coaxially with thecover or fan casing and about hinges carried by the pulverizing chamber.

The accompanying drawing, which shows the preferred method of carryingout the invention, is a plan view of the machine, the feed gear beingremoved and certain parts being broken away to show the interiorconstruction. The drawing also indicates, by means of the portions inchain lines, certain portions removed from the machine, and the fancasing and diaphragm plate swung into the open position of the machine.

The machine comprises the pulverizing chamber 2 within which can be seenparts of the moving beaters 3 and of the fixed beaters 4. A diaphragmplate 5 separates the pulverizing chamber from the fan chamber 6, thecasing for the latter being indicated at 7. The driving shaft for themachine is shown at 8 and it extends through the diaphragm plate inwhich is a large central aperture 9 through which the pulverized fuel isdrawn by the fan 10 and subsequently discharged through the outlet 11.

The fan casing 7, which forms a cover for one end of the machine, has aconical recess 12 or register engaging with a corresponding spigotalpart 13 on the diaphragm plate 5 and is provided with hinge lugs 14adapted to be connected with corresponding lugs 15 on the pulverizingchamber 2. The casing is also secured by bolts (not shown) spaced aroundit and extending through outer flange 16.

The bearing 17 for that end of the shaft carrying the fan is adapted tobe withdrawn endwise from the fan casing, after removal of the cap 18and the shaft collar 19. The bearing 17 is in the flanged bush or sleeve20 and is removed by withdrawal of this bush from the bracket 21, whichlatter at its lower part (not shown) is attached to the casing. Afterthe bearing and the flanged sleeve 20 are removed, the sleeve 22 fixedon the shaft 8 and provided with the disc 23 extending into the fancasing and at the same time filling the aperture 24 in the latters endwall, can also be removed. This leaves an annular space around the endof the shaft which allows the casing to swing about its hinge axis 25without fouling the end of the shaft, as is shown by the chain lines.When the casing has been swung open the fan wheel 10 is exposed, and thelatter is so secured to its shaft that it can be quickly detachedtherefrom.

The diaphragm plate 5 is also hinged to the pulverizing chambercoaxially of the fan casing hinge, its hinge lugs 26 being locatedbetween those provided for the casing. As above mentioned, there is acentral aperture 9 in the diaphragm plate of relatively large diameter,and this enables the plate to be swung about its hinge without foulingthe end of the fan shaft. A conical spigot 27 or register is alsoprovided on the diaphragm plate to engage with the pulverizing chamber.

The same bolts may serve to secure both the fan casing and the diaphragmplate to the pulverizing chamber, and when these are removed and thebearing has been withdrawn from the casing it is possible veryexpeditiously to obtain access either to the interior of the fan casingonly or to the interior of the pulverizing chamber.

TVhat I claim as my invention and desire to secure by Letters Patent ofthe United States is 1. A pulverizing apparatus comprising a pulverizingchamber, a casing wall and a diaphragm plate hinged thereto, a rotatableshaft passing through the casing wall and plate, and a romavble bearingfor said shaft mounted on one of the hinged parts, said parts being soconstructed and arranged that by first removing said bearing the casingand plate may be swung open without interference with said shaft.

2. A pulverizing apparatus comprising a pulverizing chamber, a coverhinged to said chamber, a rotatable shaft, and a removable bearing forsaid shaft, said bearing being mounted on. the cover and arranged forwithdrawal endwise clear of said cover to permit the opening thereof.

3. A pulverizing apparatus comprising a casing, a cover hinged theretoand having an opening therein, a rotatable shaft adjacent the opening,and a removable bearing for the shaft mounted on the cover within saidopening, said parts being so constructed and arranged that the removalof the bearing will permit the swinging open of the cover withoutdisturbing the shaft.

4. A pulverizing apparatus comprising a casing, a cover hinged theretoand having a large opening through the central portion thereof, arotatable shaft extending through the opening and spaced from the edgethereof sufficiently to permit the cover to swing clear thereof, and aremovable bearing for the shaft mounted on the cover within the opening.

5. A pulverizing apparatus comprising a pulverizing chamber, a fancasing, a diaphragm plate arranged to form a partition between saidpulverizer chamber and said fan casing, said diaphragm plate and saidfan casing being hinged to said pulverizing chamher, a rotatable shaft,a removable bearing for said shaft mounted on said fan casing, and a fanremovably mounted onsaid shaft within said fan casing, said parts beingso constructed and arranged that said hearing may be removed from thefan casing and the fan casing swung outwardly to permit access to theinterior of the fan casing without interference' with the shaft, and thefan removed and the diaphragm plate also swung open to permit access tothe interior of the pulverizing chamber.

6. A pulverizing apparatus comprising a pulverizing chamber, a rotatableshaft therein, a fan casing hinged to the pulverizing chamber andadapted to swing clear of the shaft, a diaphragm plate hinged. to thepulverizing chamber between the chamber and fan casing and also adaptedto swing clear of the shaft, means for bringing the plate and the faneasing into alignment with the pulverizing chamber, and means forsimultaneously securing the plate and fan casing to the pulverizingchamber.

7. A pulverizing apparatus comprising a casing, a cover movably attachedthereto so as to permit access to its interior, a rotatable shaft forthe pulverizing member located within the casing and extending throughthe cover, bearings for the shaft, one of which is so positioned that itnormally prevents opening the cover, and a bearing supporting meansassociated with said bearing and cover which provides for the removal ofthe bearing and for opening the cover without disturbing the shaft.

8. A pulverizing apparatus comprising a pulverizing chamber, a coverhinged to said chamber, a rotatable shaft, and a bearing for said shaftwhich is detachably secured to the cover.

9. A pulverizing apparatus comprising a casing, a cover movably attachedthereto so as to permit access to its interior, a rotatable shaftlocated within the casing and extending through the cover, a bearing forone end of the shaft normally located in the path of the cover, andmeans removably securing the bearing in position so that it may beremoved and the cover opened.

10. A pnlverizing apparatus comprising a casing, a cover hinged theretoand having an opening through the central portion thereof, a rota tableshaft extending through the opening and spaced from the edge thereofsuffciently to permit the cover to swing clear, a bearing for one end ofthe shaft normally located in the path of the cover, and means removablysecuring the bearing in position.

In testimony whereof I have signed my name to this specification.

RALPH JAOKSUN.

